Disk brake



NGV. 7, 1933. J, PRICE 1,933,930

DISK BRAKE Ori inal Filed April 13. 1925 A eL-II INVENTOR ATTORNEYPatented` Nov. 7, 1933 lUNI'TED STATES DISK BRAKE Jacob L. Price, NewYork, N. Y., assignor to Bendix Brake Company, Chicago, Ill., acorporation of Illinois original application April 13, 1925, serial No.22,744. Divided and this application October 12, 1927. seria1N0.225,627

7 Claims.

This invention relates to disk brakes, and is illustrated as embodied inan automobile brake. ,Various important features of the invention relateto the construction and mounting of the nonrotatable parts of the brake,which embody substantial novelty in themselves and in their relation toa rotatable disk or drum member, and which will be apparent from thefollowing description of one illustrative embodiment shown in theaccompanying drawing, in which:

Figure l is a vertical transverse section through one wheel and brake;

Figure 2 is a vertical longitudinal section on the line 2 2 of Figure l,showing the inner face of one of the nonrotatable disks;

Figure 3 is a vertical longitudinal section on the line 3-3 of Figure l,showing the rotatable disk in side elevation; and

Figure 4 is a horizontal section4 on the line 4- 4 of Figure 1, showingtwo of the wedges in top plan.

In the arrangement selected for illustration, one member or disk of thebrake is a drumshaped part 10, integral with or secured to a hub 12keyed on one live axle 14 of a semiiloating axle having a housing 16,.although obviously the device is readily adaptable for use on othertypes of axles. The outer part of member 10 is in the form of a radialflat flange 18 constituting one disk of the brake, and shown as havingthe brake lining 20 riveted or otherwise secured to its opposite sides.

'I'he remainder of the wheel is in the form of an annulus 22 secured inany desired manner to a tire-carrying rim 24, and shown as fitting atits inner edge in a' rabbeted portion of member 10 and demountablyfastened by bolts 26. Thus the brake member l0 and the annulus 22 ineiect form a disk wheel. construction is covered by my prior applicationNo. 22,744, filed April 13, 1925, from which the present application isdivided.

Loosely keyed on housing 16, so that it may have sucient universalmovement to aline itself into parallelism with fdange 18, is anonrotatable backing member 28, to whichis detachably fastened at itsedge by machine screws 30, or by bolts, an overhanging flange 32engageable With'the lining of flange 18 by axial movement of the backingmember 28 against the resistance of a spring 34.

This movement may be effected by rocking a disk 36 against theresistance of one or more springs 38 by means of a link 40 connected toan arm 42 projecting through a slot in the over- This n ovel wheel- (Cl.188-72) i ,lapping parts of the backing lmember 28 and the overhangingflange 32. Disk 36 is formed on the left (Figure l) for engagement withthe brake lining on the right of flange 18, while on its back aresecured a series of wedges 44 engaging Wedges 46 on the backing member28, Preferably, in order to guard against unintentional locking of thewheels, the wedges face so that when the Vehicle is moving forward, thefriction of the brake urges disk 36 backward against the pull of link40, thus tending to release the brake and guarding against locking by anexcessive servo action.

While one illustrative embodiment of the invention has been described indetail, it is not my intention to limit its scope to that particularembodiment, or otherwise than' by the terms of the appended claims.

I claim: l

1. A vehicle comprising, in combination, a wheel having an integralradial flange, a nonrotatable member having a backing surface on oneside of said flange and having an overhanging fiange on the oppositeside thereof, a disk between the wheel flange and the backing surface,and means acting on the disk and said nonrotatable member to cause themto grip the wheel flange betweenthem.

2. A vehicle comprising', in combination, a wheel having a radialflange, a nonrotatable plate having a backing surface on one side ofsaid ange and having an overhanging ange on the opposite side thereof, adisk between the wheel flange and the backing surface, the backingsurface and said disk having co-operating Wedges, and means for rockingthe disk to cause the .Wedges to force the disk and overhanging angeVtoward each other to grip the wheel flange.

3. A vehicle comprising, in combination, a

wheel having a radial flange, a nonrotatable plate having a backingsurface on one side of said ange and having an overhanging ange on theopposite side thereof, a disk between the wheel flange and the backingsurface, the backing surface and said disk having co-operating wedges,-and means for rocking the disk to cause the wedges to force the disk andoverhanging flange toward each other to grip the wheel iiange, thewedges being sol arranged that the friction when the vehicle is movingforward tends to release the brake by turning said disk backward.

4. A vehicle comprising, in combination, an axle housingfa wheel havinga radial ange, a

nonrotatable member having a backing surface on one side of said flangeand having an overhanging flange on the opposite side thereof, a diskbetween the Wheel flange and the backing surface, and means acting onthe disk and said nonrotatable member to cause them to grip the wheelange between them, together with a spring surrounding said axle housingurging the nonrotatable member axially outwardly to prevent drag of thebrake when released.

5. A backing plate for a disk brake, having an outer overhanging flange,the flange being made separate from and secured to the plate at itsedge, said plate and flange defining an inwardlyfacing channel.

6. vA vehicle comprising, in combination, a Wheel having a brakingsurface thereon, a floating nonrotatable member having a backing surfaceon one side of said first-mentioned surface and having an overhangingflange on the oppo site side thereof, a floating disk member betweensaid first-mentioned surface and the backing surface, the backingsurface and said floating disk having means thereon co-operating withmeans for rocking the disk to force the disk and oating nonrotatablemember away from each other to grip the first-mentioned braking surface.

7. A disk brake comprising, in combination, a xed central housing,rotatable and nonrotatable friction disks, one of which disks issupported directly by said housing and has a limited universal movementto permit it to align itself in parallelism with the other.

JACOB L. PRICE.

